Behaviour of carbon dioxide jets in a confined swirling flow |
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| Institution: | 1. Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ 85298, USA;1. School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. State Key Laboratory of Multiphase Flow, Xi''an Jiaotong University, Xi''an 710049, China;1. Collaborative Innovation Center of Biomass Energy, Henan Province, School of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, PR China;2. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;3. School of Building Environment Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, PR China;4. Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, PR China;1. School of Energy and Power Engineering, Jiangsu University, PO Box 28, Zhenjiang, Jiangsu, 212013, China;2. Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Tsinghua University, Beijing, 100084, China |
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| Abstract: | An investigation of jet mixing in confined swirling flow, using carbon dioxide as the jet fluid, was carried out. In order to compare the present results with previous measurements by So et al1 on homogeneous and helium jet mixing, the experiments were carried out in the same facility and under the same test conditions. Contrary to the flow characteristics found in helium jet mixing in confined swirling flow, density difference and swirl combined to give rise to an accelerated decay of the jet and increased mixing between jet and swirling air. Consequently, the second reversed flow region observed in the swirling flow was only slightly displaced downstream. This contrasted with a radial displacement of the second reversed flow region by the helium jets and a complete destruction of the reversed flow regions by the air jets. |
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